| Title: | Colorimetric cutoff indication of relative humidity based on selectively functionalized mesoporous silica |
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| Authors: | ID Švara Fabjan, Erika (Author)
ID Nadrah, Peter (Author)
ID Ajdovec, Anja (Author)
ID Tomšič, Matija (Author)
ID Dražić, Goran (Author)
ID Mazaj, Matjaž (Author)
ID Zabukovec Logar, Nataša (Author)
ID Sever Škapin, Andrijana (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0925400520304883?via%3Dihub
Description: Open access
 PDF - Presentation file, download (7,18 MB)
MD5: 805C8C596403B96790C09F5624F8961D
 DOCX - Supplement, download (1,55 MB)
MD5: F782814D252129830B5457BF1543303F
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | We present a novel % cutoff concept of colorimetric indication of relative humidity based on dye dissolution in condensed water in capillaries of selectively functionalized mesoporours host SiO2 material. Consistently high levels of indoor air humidity induces mold and algae growth which represent a potential risks for human health and have deteriorating effect on walls as well. Simple localized humidity detection of high humidity with naked eye especially at places with low air circulation, where growth of mold usually starts first, is therefore highly desirable. The reporting dye was integrated in the non-functionalized mesoporous silica matrix with different pore diameters and selective-functionalized mesoporous silica material. After exposure to the environment of different air humidities the dye dissolved in water causing color change of adsorbent. With the use of adsorbents with different mesopore diameters high ability to tune the value of relative humidity when complete capillary condensation occurred was achieved. Materials with pore diameters of 3.0%nm, 3.5%nm and 7.0%nm exhibit gradual color change when reaching relative humidity up to 55, 79 and 88 RH% respectively. After selective methylation of the material with 7.0%nm pore diameter, non-gradual cutoff color change was achieved. Sample exhibited color change at narrow range of relative humidity (cutoff color change). Due to selective functionalized outer surface the dye dissolution occur only in condensed water in pores and therefore provide colorimetric indication only in this range. Selectively modified silica material has a great potential for a straightforward detection of high humid environment. |
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| Keywords: | turn-on colorimetric probe, selective functionalization, mesoporous silica, relative humidity, capillary condensation |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 19.04.2020 |
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| Publisher: | Elsevier B.V. |
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| Year of publishing: | 2020 |
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| Number of pages: | str. 1-11 |
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| Numbering: | Vol. 316 |
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| PID: | 20.500.12556/DiRROS-16904  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 0925-4005 |
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| DOI: | 10.1016/j.snb.2020.128138 |
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| COBISS.SI-ID: | 2570599 |
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| Copyright: | © 2020 The Author(s). Published by Elsevier B.V. |
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| Note: | Dostopen na spletu: 19 April 2020, 128138;
Št. članka: 128138;
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| Publication date in DiRROS: | 05.09.2023 |
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| Views: | 658 |
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| Downloads: | 491 |
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